So far I still think the FZ40 shows better color and detail. I still haven't gotten the setting yet to match the colors of the FZ40.
Also in the direct sunlight the LCD and EVF and not as vibrant as the FZ40.

i think some of the pop is a result of the lighting, actually i dont think, its quite obvious actually.

i saw some of the posts another member posted from the sx30, and it showed in my opinion very good contrast and color, and quite clean.

i would say based on images i have seen as far as image quality goes, i would say that individual shooting conditions would have a greater impact than any differences between the 2 cameras. i think they are highly competitive with each other, pick the 1 whos features fit your needs. i think in the end that statement will be the one that falls out of this. which is actually quite a good thing.